He went straight to the hospital when the show was done and is still there receiving treatment, reports TMZ.
Also, Bieber was seen wearing a gas mask.
UPDATE — March 7, 8:36 p.m.: Justin Bieber shares Instagram saying he is "Gettin better listenin to Janice Joplin."
Michelle Broder Van Dyke is a reporter and night editor for BuzzFeed News and is based in Hawaii.
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